Automatic taper-cutting attachment.



N9. 831,316. A PATENTED SEPT. 18, 190.6.

' W. D. ALLEN & G. A. JOHNSON.

AUTOMATIC TAPER CUTTING ATTACHMENT.

APPLTOATION FILED SEPT. 24. 1904.

| II II I, n I TIL'ILL Ly LLHJIJI No. 831,316. PATENTED SEPT. 18, 1906. W. D. ALLEN & G. A. JOHNSON. AUTOMATIC TAPER CUTTING ATTACHMENT.

APPLICATION FILED SEPT. 24. 1904 2 SHEETS-SHEET 2.

A W! i 'Ellllllllllllllllllllll!H5 UNITED STATES WILLIAM D. ALLEN NECTICUT, HAVEN, CONNECTICUT,

AND GUSTAVE A. JOHNSON, OF ASSIGNORS TO THE MARLIN FIREARMS COMPANY, OF NEW A CORPORATION OF CONNECTICUT.

PATENT OFFICE.

NEW HAVEN, CON- AUTOMATIC TAPER-CUTTING ATTACHMENT.

Specification of Letters Patent.

Patented Sept. 18, 1906.

Application'filed September 24, 1904. Serial No, 225,775.

To LLZZ whom it may concern:

Be it known that we, WILLIAM D. ALLEN and GusrAvr: A. JOHNSON, citizens of the United States, residing at New Haven, in the county of New Haven, State of. Connecticut, have invented certain new and useful Improvements in Automatic Taper-Cutting Attachments, of which the following is a full, clear, and exact description.

Our invention relates to automatic machinery, and particularly for taper-cutters.

The principal feature of the invention resides in a specially-formed cam for cooperating with the cutting mechanism, as shown in our former application, Serial No. 184,038, filed December 7, 1903.

The object of this invention is to provide a simple and inexpensive means for automat ically operating the taper-cutting device to move the cutters and form the taper and also to release the cutters when desired.

The invention resides more particularly in a cam the principles of which are illustrated in Figure 4 of the drawings. A single cam is provided for governing the cutters for every different taper desired; otherwise the mechanism of the machine isidentical for each taper. It is necessary, therefore, in order to change from one taper to another simply to change the cams. This reduces the cost of the machinery, lessening the number of parts and the amount of labor necessary for making the interchange.

In' the accompanying two sheets of drawings, Fig. 1 is a vertical cross-section showing those parts of an automatic taper-cutting attachment for screw-machines, which are necessary for illustration of our invention.

Fig. 2 is a plan view of the main parts of the machine, illustrating the parts in position after the taper-cutting operation. Fig. 3 is an end View of the taper-cutter, showing the guide in place. Fig. 4 is a view showing the cam for operating the cutters. Fig. 5 is a plan view of the same. Fig. 6 is a fragmentarydetailview illustrating the means for retracting the cutter.

1 indicates the frame of the machine.

2 is a suitable chuck for carrying the stock 5o 3 as it is fed through the head.

4 illustrates the suitable driving-pulleys. 5 indicates a portion of a turret, as illustrated in our above-mentioned application.

I 6 is the body of the cutting-tool.

application. The turret and cutter are fed toward the stock in any suitable manner.

15 is a guide member for cooperating with the shoulder 16, carried by the cutter-block.

17 and 18 are cross-slides, which carr suitable cutting-off mechanism. The slide 17 also carries the guide 15. The slides are caused to move backward and forward by suitable automatic mechanism, eludes the cam to which this ticularly relates.

19 is a pivoted lever, which carries a segmental gear for cooperating with the slide 17 20 is a second lever similarly mounted, preferably on the same shaft with the lever 19 and having a segmental-gear portion, which cooperates with the intermediate segmental gear 21, the latter being coupled with the slide 18 for moving it back and forth.

22 is a cam-shaft, which is driven in any suitable manner at the proper speed, so that it will make one revolution for each advance of the turret and cutting-tool toward the head. Upon thisshaft 22 are mounted two cams, one of the ordinary construction for operating the lever 20, and hence the crossslide 18 for moving one of the cutting-oif tools. 28 is a special cam, which is also mounted on the shaft 22 for coacting with the roller 24, carried by the lever 19. This cam during the normal operation of the machine rotates in the direction of the arrows.

As the cam rotates from the position shown in Fig. 1 the slide 17 is moved backward, carrying guide 15. The cutter at this time is in operation, the shoulder 16 engaging the guide. As the guide moves backward the cutter carried by the turret is simultaneously moved longitudinally of the stock-axis and recedes from the axis of the stock under the impulse of the spring 9, and the taper is former. When the cam'23 has rotated so that the roller 24 falls into the recess a; (see Fig. 4) by reason of its weight, the slide 17 is moved backward, so that the guide 15 clears the shoulder 16 and allows the cutter to retract its full extent under impulse of spring 9. The turret is at this time drawn back to the position shown in Fig. 2 by the usual automatic mechanism. As the cam continues to rotate the incline y engages the roller 24: and moves the slide 17 toward the stock preparatory to the usual cutting-oil operation. At the same time the lever 20 is operated by the usual cam for moving the other slide 18 similarly toward the axis. While the cam is rotating through the part 2 the slide is fed toward the axis for the actual cutting-off operation. Continuing to rotate the cam permits the roller 24 to drop down again and retract the slide 17 preparatory to the next forward movement of the turret and cutter. The cam then rotates through the are marked 1), wh'le the slide 17 remains stationary as the cutter-block is moved forward into position. As the cam rotates through the arc w the slide 17 retracts and permits the cutter 7 to retract for the taper-cutting operation.

What we claim is- 1. An automatic taper-cutting attachment of the character described comprising the combination of a cutting-tool movable parallel to the axis and also in a direction toward the axis of the work, a cross-slide movable independently of the cutting-tool, a straight-edged guide carried thereby adapted to coact with said tool to control its position to and from the axis as the tool is advanced in a direction parallel to the axis, a rotatable cam having a bearing-surface shaped according to the taper desired and means of connec tion between said cam and said slide for the urpose describe 2. In a taper-cutting attachment of the character described, the combination of a cross-slide movable transversely of the workaxis, a cutting-tool movable parallel to and transversely of the axis, means carriedby the cross-slide for coacting with the cutting-tool, a rotatable cam, means of connection between said cam and said cross-slide said cam having a portion shaped to hold said slide stationary as the cam rotates, another portion adapted to move the slide slowly for the purpose of controlling the taper cut, a third portion to control said slide to retract the cutting-tool and a fourth portion for controlling said slide to move it forward to the cutting-off operation.

3. In a taper-cutting attachment, the combination with a cutting-tool movable in a direction parallel to the work-axis and also ina direction transversely of the work-axis, of an independent cross-slide, a guide carried thereby adapted to coact with the cutting-tool, and a cam for controlling the transverse position of said slide and guide, said cam having the portion a) for controlling the position of the cross-slide preparatory to the cutting operation and the portion w for moving the cross-slide and guide transversely and controlling the cuttingtool to effect the taper cut desired.

4. In a taper-cutting machine, the combination, with a cutting-tool movable in a direction parallel to the work-axis and also in a direction transversely of the work-axis, of an independent cross-slide, a guide carried thereby adapted to coact with the cutting-tool, a cam for controlling the transverse position 0" said slide and guide, a connection between said cam and said slide, said cam having the ortion w for moving the cross-slide and guide transversely and controlling the cutting-tool to effect the taper cut desired, and the recessed portion a; for permitting the cross-slide and guide to move, so as to retract the cutting-tool preparatory to its return. to

its initial position.

WILLIAM D. ALLEN. GUSTAVE A. JOHNSON. Witnesses:

MAHLON II. MARLIN, F. E. BRADLEY. 

